Damper-regulator



(No Model.) 2 Sheets-Sheet 1.

v G. F. PATTERSON;

DAMPER REGULATOR.

No. 600,843. Patented Mar. 15 1898.

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AT T D NEY- (No Model.) 2 SheetsSheet 2.

G.F. PATTER SON.

DAMPER REGULATOR. No. 600,843. Patented Mar. 15.1898.

A'T TDRNE'Y.

Unirrn terns GEORGE F. PATTERSON, OF BALTIMORE, MARYLAND, ASSIGNOR TO THE PATTERSON DAMPER REGULATOR COMPANY, OF IVEST VIRGINIA.

DAM PER-REGULATOR.

SPECIFICATION forming part of Letters Patent No. 600,843, dated March 15, 1898.

Application filed $eptember 20, 1897. Serial No. 652,231. (No model.)

To all whom it may concern.-

Be it known that I, GEORGE F. PATTERSON, a citizen of the United States, residing at Baltimore, in the State of Maryland, have invented certain new and useful Improvements in Damper-Regulators, of which the following is aspecification.

This invention relates to automatic damperregulators for furnaces of steam-boilers.

The object of the invention is to provide an improved construction for operating the valve which controls the communication of water to and from the damper-motor.

The invention is illustrated in the accompanying drawings, in which Figure 1 is an elevation, in which apart is shown in section, of an apparatus embodying my invention. Fig. 2 is a vertical section of the valve device. Fig. 3 is an elevation of the valve-case and shows the improved construction for operating the valve.

The letter A designates a vertical cylinder containing a piston, to which a rod 79 is attached, said rod projecting out of the top of the cylinder. This is the ordinary dampermotor. A cord 0, attached to the piston-rod, leads to the arm of the damper. (Not shown.) Tightening the cord serves to open the damper. slackening the cord closes the damper. A weight 01 on the piston-rod serves to press the latter down when the valve is moved to allow the water in the cylinder A to discharge.

The valve-case F and the cylinder A are connected by a pipe e, through which water flows both forward and back. A pipe 9 leads from a source of water-pressure to the valvecase F, and another pipe h leads from the valve-case to a drain or waste pipe.

A lever I like a scale-beam has at its end a hanging weight I, and a sliding weight I is movable along the beam. This lever is raised and lowered by the variations of steam-pressure in the boiler acting in a cylinder or 1110- tor J, which is fitted with a diaphragm 7c, and a pipe Zcommunioates with this cylinder and leads from the steam-boiler. (Not shown.) A stud or prop m rests on the diaphragm and has a knife-edge which engages the lever or scale-beam I. A post has two set-screws n and n, which take, respectively, above and below the said lever I and limit the up-anddown movement of the latter.

The parts thus far described are well known in apparatus of this character.

My improvements in the valve are shown in detail in Figs. 2 and 3;

The valve-case F has a screw connection e for the motor-pipe e, a screw connection for the Water-pressure pipe g, and another,h, for the waste-water pipeh. It also has a central val ve-bushin g o, with a cylindric passage p for the movement of the piston-valve g. This valve governs a port g, which communicates by way of pipe 6 with the motor-cylinder A. The cylindric valve-passage 19 has a lower open passage 1), communicating with the connection g, through which the waterpressure enters on its flow to the motor A, p

and an upper open passage p communicating with the connection h, from which the waste water that has been in the motor discharges. When the piston-valve q is in the position shown in Fig. 2, the port p is open to establish communication from the motorcylinder A to the waste-water pipe h. When the valve q is moved upward, so as to open the port q to the lower passage 19, communication will be established for the waterpressure in pipe 9 to flow to the motor-cylinder.

The piston-valve q is attached to a stem '1', and said stem and valve may be drawn upward'and entirely out of the valve-case without removing any screw-cap or other part of the valve-case. The upper endof the stem r has a head r, and a suitable spring 3 acts on the valve-stem and normally raises it to shift the valve q, so as to open communication from the water-pressure pipe g to the motor, and thereby slacken the cord 0 and close the damper. In the present instance a spiral spring sis employed to act on the valve-stem and shift the valve upward.

It is to be understood that the details 0 construction of the parts that compose the valve-case are such as to enable the valve q to move either waywithequal freedom.

The means for shifting the valve downward consists of an arm 6, carried on the leverI and proj ectin g sidewise therefrom. This arm is not attached to the valve-stem r, but merely bears on top of the head r of the stem. When the beam or lever I tilts downward, the arm i will press the stem and valve (1 downward. When the lever I tilts upward, this arm 6 will liftoff the stem-head,and thereupon the spring 8 will slowly raise the stem and valve g.

It will be seen the valve is operated by the lever without having a positive mechanical connection between it and the lever, and this construction affords advantages of importance. For instance, if the valve-stem 1" does not move up when the lever I raises it will be known at once by the engineer that the valve (1 is working too hard from some cause, and he will at once give it attention. Where the valve-stem is attached to or connected positively with the lever, there is no means of knowingwhenitisworkingtoostiffly. Again, this construction avoids sudden movements of the valve. If the lever I tilts up suddenly, the arm 25 will lift off the valve-stem and the valve Will be raised slowly by the action of the spring 5. In the down movement of the lever I the spring 3 offers some resistance, which causes the valve to move down slowly;

The arm has one end attached by a pivot to to a clevis '0, which is fitted so as to slide on the lever I. A set-screw w on the bottom of the clevis impinges against the lever and holds the clevis wherever it may be set. A set-screw 0c is on the arm 6, and the end of this screw impinges against the pivot u and holds the arm in its proper position to bear on the valve-stem 7*. When it is desired to take the valve-stem out of the valve-case F, the set-screwoc must be loosened to allow the arm to swing sidewise on its pivot to, and then the Valve-stem 0" may be at once drawn out of the case. The sliding clevis is useful in that it permits the arm i to be accurately adjusted along the lever, so as to properly bear on the valve-stem after the valve-case F has been fitted to its pipe connection. These connections result in slight variations in the position of the valve-case relative to the damper-motor A. One apparatus after it has been set up will thereby vary from another; but the sliding clevis enables the arm to be located on the lever I at the exact point where it will most accurately fit on the valvestem.

Having thus described my invention,what I claim is 1. In a damper-regulator, the combination of the lever, I, operated by variations of the steam-pressure in the boiler; a damper-motor operated by water-pressure; avalve controlling the water passing to and from the damper-motor and having a stem which projects from the valve-case; a spring acting on the valve-stem and raising the valve; a clevis device which is capable of sliding on the said lever; and an arm attached to said clevis device and projecting sidewise and adapted to bear on top of the valve-stem and lower the valve but unconnected with said stem.

2. In a damper-regulator, the combination of the lever, I, operated by variations of the steam-pressure in the boiler; a damper-motor; a Water-controlling valve having a stem which projects from the valve-case; a spring acting on the valve-stem and raising the valve; and an arm carried by said lever and pivoted to bear on said valve-stem when in one position and to be free of the valve-stem and to enable the latter to be removed when in the other position.

In testimony whereof I affix my signature in the presence of two witnesses.

GEORGE F. PATTERSON.

Witnesses: I

CHAPIN A. FERGUSON, CHARLES B. MANN, Jr. 

